With the expansion expected to increase the size of the main building at the Carnegie Science Center by more than 28 percent, the new pavilion will be used for STEM learning labs, traveling exhibits and conference space.

The project is being managed by Oxford Development Co. working from a design by Strip District-based Indovina Associates Architects.

Construction on the expansion is expected to begin in October and be completed by June 2018.

Correction/Clarification

An earlier version of this story listed some incorrect details about the expansion. The cost is estimated to be $21 million, and it will include STEM learning labs, traveling exhibits and conference space. Also, the Carnegie Science Center is located along the Ohio River.